Message handler is not working

[mr52k]

Hii Team,

1. I am new for bus master. so, I have installed bus master tool v3.2.2 latest version. and in that I have written one node simulation script for sending TX messages. in that node simulation script message handler is there so I have used that handler in script and it is like a whenever RX message comes the TX message should respond it for that RX message. it is not happening anything so please help me in that.
2. one more thing that message handler it's not triggering the function.
3. and also, below i am attaching the image of what i am getting.
   thanks team.